1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020, 2022 Vladimir Kondratyev <wulf@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Elan I2C Touchpad driver. Based on Linux driver. 30 * https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/input/mouse/elan_i2c_core.c 31 */ 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/sysctl.h> 42 #include <sys/systm.h> 43 44 #include <dev/evdev/evdev.h> 45 #include <dev/evdev/input.h> 46 47 #include <dev/iicbus/iic.h> 48 #include <dev/iicbus/iicbus.h> 49 50 #define HID_DEBUG_VAR ietp_debug 51 #include <dev/hid/hid.h> 52 #include <dev/hid/hidbus.h> 53 #include <dev/hid/hidquirk.h> 54 55 #ifdef HID_DEBUG 56 static SYSCTL_NODE(_hw_hid, OID_AUTO, ietp, CTLFLAG_RW, 0, 57 "Elantech Touchpad"); 58 static int ietp_debug = 1; 59 SYSCTL_INT(_hw_hid_ietp, OID_AUTO, debug, CTLFLAG_RWTUN, 60 &ietp_debug, 1, "Debug level"); 61 #endif 62 63 #define IETP_PATTERN 0x0100 64 #define IETP_UNIQUEID 0x0101 65 #define IETP_FW_VERSION 0x0102 66 #define IETP_IC_TYPE 0x0103 67 #define IETP_OSM_VERSION 0x0103 68 #define IETP_NSM_VERSION 0x0104 69 #define IETP_TRACENUM 0x0105 70 #define IETP_MAX_X_AXIS 0x0106 71 #define IETP_MAX_Y_AXIS 0x0107 72 #define IETP_RESOLUTION 0x0108 73 #define IETP_PRESSURE 0x010A 74 75 #define IETP_CONTROL 0x0300 76 #define IETP_CTRL_ABSOLUTE 0x0001 77 #define IETP_CTRL_STANDARD 0x0000 78 79 #define IETP_REPORT_LEN_LO 32 80 #define IETP_REPORT_LEN_HI 37 81 #define IETP_MAX_FINGERS 5 82 83 #define IETP_REPORT_ID_LO 0x5D 84 #define IETP_REPORT_ID_HI 0x60 85 86 #define IETP_TOUCH_INFO 1 87 #define IETP_FINGER_DATA 2 88 #define IETP_FINGER_DATA_LEN 5 89 #define IETP_HOVER_INFO 28 90 #define IETP_WH_DATA 31 91 92 #define IETP_TOUCH_LMB (1 << 0) 93 #define IETP_TOUCH_RMB (1 << 1) 94 #define IETP_TOUCH_MMB (1 << 2) 95 96 #define IETP_MAX_PRESSURE 255 97 #define IETP_FWIDTH_REDUCE 90 98 #define IETP_FINGER_MAX_WIDTH 15 99 #define IETP_PRESSURE_BASE 25 100 101 struct ietp_softc { 102 device_t dev; 103 104 struct evdev_dev *evdev; 105 bool open; 106 uint8_t report_id; 107 hid_size_t report_len; 108 109 uint16_t product_id; 110 uint16_t ic_type; 111 112 int32_t pressure_base; 113 uint16_t max_x; 114 uint16_t max_y; 115 uint16_t trace_x; 116 uint16_t trace_y; 117 uint16_t res_x; /* dots per mm */ 118 uint16_t res_y; 119 bool hi_precision; 120 bool is_clickpad; 121 bool has_3buttons; 122 }; 123 124 static evdev_open_t ietp_ev_open; 125 static evdev_close_t ietp_ev_close; 126 static hid_intr_t ietp_intr; 127 128 static int ietp_probe(struct ietp_softc *); 129 static int ietp_attach(struct ietp_softc *); 130 static int ietp_detach(struct ietp_softc *); 131 static int32_t ietp_res2dpmm(uint8_t, bool); 132 133 static device_identify_t ietp_iic_identify; 134 static device_probe_t ietp_iic_probe; 135 static device_attach_t ietp_iic_attach; 136 static device_detach_t ietp_iic_detach; 137 static device_resume_t ietp_iic_resume; 138 139 static int ietp_iic_read_reg(device_t, uint16_t, size_t, void *); 140 static int ietp_iic_write_reg(device_t, uint16_t, uint16_t); 141 static int ietp_iic_set_absolute_mode(device_t, bool); 142 143 #define IETP_IIC_DEV(pnp) \ 144 { HID_TLC(HUP_GENERIC_DESKTOP, HUG_MOUSE), HID_BUS(BUS_I2C), HID_PNP(pnp) } 145 146 static const struct hid_device_id ietp_iic_devs[] = { 147 IETP_IIC_DEV("ELAN0000"), 148 IETP_IIC_DEV("ELAN0100"), 149 IETP_IIC_DEV("ELAN0600"), 150 IETP_IIC_DEV("ELAN0601"), 151 IETP_IIC_DEV("ELAN0602"), 152 IETP_IIC_DEV("ELAN0603"), 153 IETP_IIC_DEV("ELAN0604"), 154 IETP_IIC_DEV("ELAN0605"), 155 IETP_IIC_DEV("ELAN0606"), 156 IETP_IIC_DEV("ELAN0607"), 157 IETP_IIC_DEV("ELAN0608"), 158 IETP_IIC_DEV("ELAN0609"), 159 IETP_IIC_DEV("ELAN060B"), 160 IETP_IIC_DEV("ELAN060C"), 161 IETP_IIC_DEV("ELAN060F"), 162 IETP_IIC_DEV("ELAN0610"), 163 IETP_IIC_DEV("ELAN0611"), 164 IETP_IIC_DEV("ELAN0612"), 165 IETP_IIC_DEV("ELAN0615"), 166 IETP_IIC_DEV("ELAN0616"), 167 IETP_IIC_DEV("ELAN0617"), 168 IETP_IIC_DEV("ELAN0618"), 169 IETP_IIC_DEV("ELAN0619"), 170 IETP_IIC_DEV("ELAN061A"), 171 IETP_IIC_DEV("ELAN061B"), 172 IETP_IIC_DEV("ELAN061C"), 173 IETP_IIC_DEV("ELAN061D"), 174 IETP_IIC_DEV("ELAN061E"), 175 IETP_IIC_DEV("ELAN061F"), 176 IETP_IIC_DEV("ELAN0620"), 177 IETP_IIC_DEV("ELAN0621"), 178 IETP_IIC_DEV("ELAN0622"), 179 IETP_IIC_DEV("ELAN0623"), 180 IETP_IIC_DEV("ELAN0624"), 181 IETP_IIC_DEV("ELAN0625"), 182 IETP_IIC_DEV("ELAN0626"), 183 IETP_IIC_DEV("ELAN0627"), 184 IETP_IIC_DEV("ELAN0628"), 185 IETP_IIC_DEV("ELAN0629"), 186 IETP_IIC_DEV("ELAN062A"), 187 IETP_IIC_DEV("ELAN062B"), 188 IETP_IIC_DEV("ELAN062C"), 189 IETP_IIC_DEV("ELAN062D"), 190 IETP_IIC_DEV("ELAN062E"), /* Lenovo V340 Whiskey Lake U */ 191 IETP_IIC_DEV("ELAN062F"), /* Lenovo V340 Comet Lake U */ 192 IETP_IIC_DEV("ELAN0631"), 193 IETP_IIC_DEV("ELAN0632"), 194 IETP_IIC_DEV("ELAN0633"), /* Lenovo S145 */ 195 IETP_IIC_DEV("ELAN0634"), /* Lenovo V340 Ice lake */ 196 IETP_IIC_DEV("ELAN0635"), /* Lenovo V1415-IIL */ 197 IETP_IIC_DEV("ELAN0636"), /* Lenovo V1415-Dali */ 198 IETP_IIC_DEV("ELAN0637"), /* Lenovo V1415-IGLR */ 199 IETP_IIC_DEV("ELAN1000"), 200 }; 201 202 static uint8_t const ietp_dummy_rdesc[] = { 203 0x05, HUP_GENERIC_DESKTOP, /* Usage Page (Generic Desktop Ctrls) */ 204 0x09, HUG_MOUSE, /* Usage (Mouse) */ 205 0xA1, 0x01, /* Collection (Application) */ 206 0x09, 0x01, /* Usage (0x01) */ 207 0x95, IETP_REPORT_LEN_LO, /* Report Count (IETP_REPORT_LEN_LO) */ 208 0x75, 0x08, /* Report Size (8) */ 209 0x81, 0x02, /* Input (Data,Var,Abs) */ 210 0xC0, /* End Collection */ 211 }; 212 213 static const struct evdev_methods ietp_evdev_methods = { 214 .ev_open = &ietp_ev_open, 215 .ev_close = &ietp_ev_close, 216 }; 217 218 static int 219 ietp_ev_open(struct evdev_dev *evdev) 220 { 221 struct ietp_softc *sc = evdev_get_softc(evdev); 222 int error; 223 224 error = hid_intr_start(sc->dev); 225 if (error == 0) 226 sc->open = true; 227 return (error); 228 } 229 230 static int 231 ietp_ev_close(struct evdev_dev *evdev) 232 { 233 struct ietp_softc *sc = evdev_get_softc(evdev); 234 int error; 235 236 error = hid_intr_stop(sc->dev); 237 if (error == 0) 238 sc->open = false; 239 return (error); 240 } 241 242 static int 243 ietp_probe(struct ietp_softc *sc) 244 { 245 if (hidbus_find_child(device_get_parent(sc->dev), 246 HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD)) != NULL) { 247 DPRINTFN(5, "Ignore HID-compatible touchpad on %s\n", 248 device_get_nameunit(device_get_parent(sc->dev))); 249 return (ENXIO); 250 } 251 252 device_set_desc(sc->dev, "Elan Touchpad"); 253 254 return (BUS_PROBE_DEFAULT); 255 } 256 257 static int 258 ietp_attach(struct ietp_softc *sc) 259 { 260 const struct hid_device_info *hw = hid_get_device_info(sc->dev); 261 void *d_ptr; 262 hid_size_t d_len; 263 int32_t minor, major; 264 int error; 265 266 sc->report_id = sc->hi_precision ? 267 IETP_REPORT_ID_HI : IETP_REPORT_ID_LO; 268 sc->report_len = sc->hi_precision ? 269 IETP_REPORT_LEN_HI : IETP_REPORT_LEN_LO; 270 271 /* Try to detect 3-rd button by relative mouse TLC */ 272 if (!sc->is_clickpad) { 273 error = hid_get_report_descr(sc->dev, &d_ptr, &d_len); 274 if (error != 0) { 275 device_printf(sc->dev, "could not retrieve report " 276 "descriptor from device: %d\n", error); 277 return (ENXIO); 278 } 279 if (hidbus_locate(d_ptr, d_len, HID_USAGE2(HUP_BUTTON, 3), 280 hid_input, hidbus_get_index(sc->dev), 0, NULL, NULL, NULL, 281 NULL)) 282 sc->has_3buttons = true; 283 } 284 285 sc->evdev = evdev_alloc(); 286 evdev_set_name(sc->evdev, device_get_desc(sc->dev)); 287 evdev_set_phys(sc->evdev, device_get_nameunit(sc->dev)); 288 evdev_set_id(sc->evdev, hw->idBus, hw->idVendor, hw->idProduct, 289 hw->idVersion); 290 evdev_set_serial(sc->evdev, hw->serial); 291 evdev_set_methods(sc->evdev, sc, &ietp_evdev_methods); 292 evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_STCOMPAT); 293 evdev_set_flag(sc->evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */ 294 295 evdev_support_event(sc->evdev, EV_SYN); 296 evdev_support_event(sc->evdev, EV_ABS); 297 evdev_support_event(sc->evdev, EV_KEY); 298 evdev_support_prop(sc->evdev, INPUT_PROP_POINTER); 299 evdev_support_key(sc->evdev, BTN_LEFT); 300 if (sc->is_clickpad) { 301 evdev_support_prop(sc->evdev, INPUT_PROP_BUTTONPAD); 302 } else { 303 evdev_support_key(sc->evdev, BTN_RIGHT); 304 if (sc->has_3buttons) 305 evdev_support_key(sc->evdev, BTN_MIDDLE); 306 } 307 308 major = IETP_FINGER_MAX_WIDTH * MAX(sc->trace_x, sc->trace_y); 309 minor = IETP_FINGER_MAX_WIDTH * MIN(sc->trace_x, sc->trace_y); 310 311 evdev_support_abs(sc->evdev, ABS_MT_SLOT, 312 0, IETP_MAX_FINGERS - 1, 0, 0, 0); 313 evdev_support_abs(sc->evdev, ABS_MT_TRACKING_ID, 314 -1, IETP_MAX_FINGERS - 1, 0, 0, 0); 315 evdev_support_abs(sc->evdev, ABS_MT_POSITION_X, 316 0, sc->max_x, 0, 0, sc->res_x); 317 evdev_support_abs(sc->evdev, ABS_MT_POSITION_Y, 318 0, sc->max_y, 0, 0, sc->res_y); 319 evdev_support_abs(sc->evdev, ABS_MT_PRESSURE, 320 0, IETP_MAX_PRESSURE, 0, 0, 0); 321 evdev_support_abs(sc->evdev, ABS_MT_ORIENTATION, 0, 1, 0, 0, 0); 322 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MAJOR, 0, major, 0, 0, 0); 323 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MINOR, 0, minor, 0, 0, 0); 324 evdev_support_abs(sc->evdev, ABS_DISTANCE, 0, 1, 0, 0, 0); 325 326 error = evdev_register(sc->evdev); 327 if (error != 0) { 328 ietp_detach(sc); 329 return (ENOMEM); 330 } 331 332 hidbus_set_intr(sc->dev, ietp_intr, sc); 333 334 device_printf(sc->dev, "[%d:%d], %s\n", sc->max_x, sc->max_y, 335 sc->is_clickpad ? "clickpad" : 336 sc->has_3buttons ? "3 buttons" : "2 buttons"); 337 338 return (0); 339 } 340 341 static int 342 ietp_detach(struct ietp_softc *sc) 343 { 344 evdev_free(sc->evdev); 345 346 return (0); 347 } 348 349 static void 350 ietp_intr(void *context, void *buf, hid_size_t len) 351 { 352 struct ietp_softc *sc = context; 353 union evdev_mt_slot slot_data; 354 uint8_t *report, *fdata; 355 int32_t finger; 356 int32_t x, y, w, h, wh; 357 358 /* we seem to get 0 length reports sometimes, ignore them */ 359 if (len == 0) 360 return; 361 if (len != sc->report_len) { 362 DPRINTF("wrong report length (%d vs %d expected)", len, sc->report_len); 363 return; 364 } 365 366 report = buf; 367 if (*report != sc->report_id) 368 return; 369 370 evdev_push_key(sc->evdev, BTN_LEFT, 371 report[IETP_TOUCH_INFO] & IETP_TOUCH_LMB); 372 evdev_push_key(sc->evdev, BTN_MIDDLE, 373 report[IETP_TOUCH_INFO] & IETP_TOUCH_MMB); 374 evdev_push_key(sc->evdev, BTN_RIGHT, 375 report[IETP_TOUCH_INFO] & IETP_TOUCH_RMB); 376 evdev_push_abs(sc->evdev, ABS_DISTANCE, 377 (report[IETP_HOVER_INFO] & 0x40) >> 6); 378 379 for (finger = 0, fdata = report + IETP_FINGER_DATA; 380 finger < IETP_MAX_FINGERS; 381 finger++, fdata += IETP_FINGER_DATA_LEN) { 382 if ((report[IETP_TOUCH_INFO] & (1 << (finger + 3))) != 0) { 383 if (sc->hi_precision) { 384 x = fdata[0] << 8 | fdata[1]; 385 y = fdata[2] << 8 | fdata[3]; 386 wh = report[IETP_WH_DATA + finger]; 387 } else { 388 x = (fdata[0] & 0xf0) << 4 | fdata[1]; 389 y = (fdata[0] & 0x0f) << 8 | fdata[2]; 390 wh = fdata[3]; 391 } 392 393 if (x > sc->max_x || y > sc->max_y) { 394 DPRINTF("[%d] x=%d y=%d over max (%d, %d)", 395 finger, x, y, sc->max_x, sc->max_y); 396 continue; 397 } 398 399 /* Reduce trace size to not treat large finger as palm */ 400 w = (wh & 0x0F) * (sc->trace_x - IETP_FWIDTH_REDUCE); 401 h = (wh >> 4) * (sc->trace_y - IETP_FWIDTH_REDUCE); 402 403 slot_data = (union evdev_mt_slot) { 404 .id = finger, 405 .x = x, 406 .y = sc->max_y - y, 407 .p = MIN((int32_t)fdata[4] + sc->pressure_base, 408 IETP_MAX_PRESSURE), 409 .ori = w > h ? 1 : 0, 410 .maj = MAX(w, h), 411 .min = MIN(w, h), 412 }; 413 evdev_mt_push_slot(sc->evdev, finger, &slot_data); 414 } else { 415 evdev_push_abs(sc->evdev, ABS_MT_SLOT, finger); 416 evdev_push_abs(sc->evdev, ABS_MT_TRACKING_ID, -1); 417 } 418 } 419 420 evdev_sync(sc->evdev); 421 } 422 423 static int32_t 424 ietp_res2dpmm(uint8_t res, bool hi_precision) 425 { 426 int32_t dpi; 427 428 dpi = hi_precision ? 300 + res * 100 : 790 + res * 10; 429 430 return (dpi * 10 /254); 431 } 432 433 static void 434 ietp_iic_identify(driver_t *driver, device_t parent) 435 { 436 void *d_ptr; 437 hid_size_t d_len; 438 int isize; 439 uint8_t iid; 440 441 if (HIDBUS_LOOKUP_ID(parent, ietp_iic_devs) == NULL) 442 return; 443 if (hid_get_report_descr(parent, &d_ptr, &d_len) != 0) 444 return; 445 446 /* 447 * Some Elantech trackpads have a mangled HID report descriptor, which 448 * reads as having an incorrect input size (i.e. < IETP_REPORT_LEN_LO). 449 * If the input size is incorrect, load a dummy report descriptor. 450 */ 451 452 isize = hid_report_size_max(d_ptr, d_len, hid_input, &iid); 453 if (isize >= IETP_REPORT_LEN_LO) 454 return; 455 456 hid_set_report_descr(parent, ietp_dummy_rdesc, 457 sizeof(ietp_dummy_rdesc)); 458 } 459 460 static int 461 ietp_iic_probe(device_t dev) 462 { 463 struct ietp_softc *sc = device_get_softc(dev); 464 device_t iichid; 465 int error; 466 467 error = HIDBUS_LOOKUP_DRIVER_INFO(dev, ietp_iic_devs); 468 if (error != 0) 469 return (error); 470 471 iichid = device_get_parent(device_get_parent(dev)); 472 if (device_get_devclass(iichid) != devclass_find("iichid")) 473 return (ENXIO); 474 475 sc->dev = dev; 476 477 return (ietp_probe(sc)); 478 } 479 480 static int 481 ietp_iic_attach(device_t dev) 482 { 483 struct ietp_softc *sc = device_get_softc(dev); 484 uint16_t buf, reg; 485 uint8_t *buf8; 486 uint8_t pattern; 487 488 buf8 = (uint8_t *)&buf; 489 490 if (ietp_iic_read_reg(dev, IETP_UNIQUEID, sizeof(buf), &buf) != 0) { 491 device_printf(sc->dev, "failed reading product ID\n"); 492 return (EIO); 493 } 494 sc->product_id = le16toh(buf); 495 496 if (ietp_iic_read_reg(dev, IETP_PATTERN, sizeof(buf), &buf) != 0) { 497 device_printf(sc->dev, "failed reading pattern\n"); 498 return (EIO); 499 } 500 pattern = buf == 0xFFFF ? 0 : buf8[1]; 501 sc->hi_precision = pattern >= 0x02; 502 503 reg = pattern >= 0x01 ? IETP_IC_TYPE : IETP_OSM_VERSION; 504 if (ietp_iic_read_reg(dev, reg, sizeof(buf), &buf) != 0) { 505 device_printf(sc->dev, "failed reading IC type\n"); 506 return (EIO); 507 } 508 sc->ic_type = pattern >= 0x01 ? be16toh(buf) : buf8[1]; 509 510 if (ietp_iic_read_reg(dev, IETP_NSM_VERSION, sizeof(buf), &buf) != 0) { 511 device_printf(sc->dev, "failed reading SM version\n"); 512 return (EIO); 513 } 514 sc->is_clickpad = (buf8[0] & 0x10) != 0; 515 516 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 517 device_printf(sc->dev, "failed to set absolute mode\n"); 518 return (EIO); 519 } 520 521 if (ietp_iic_read_reg(dev, IETP_MAX_X_AXIS, sizeof(buf), &buf) != 0) { 522 device_printf(sc->dev, "failed reading max x\n"); 523 return (EIO); 524 } 525 sc->max_x = le16toh(buf); 526 527 if (ietp_iic_read_reg(dev, IETP_MAX_Y_AXIS, sizeof(buf), &buf) != 0) { 528 device_printf(sc->dev, "failed reading max y\n"); 529 return (EIO); 530 } 531 sc->max_y = le16toh(buf); 532 533 if (ietp_iic_read_reg(dev, IETP_TRACENUM, sizeof(buf), &buf) != 0) { 534 device_printf(sc->dev, "failed reading trace info\n"); 535 return (EIO); 536 } 537 sc->trace_x = sc->max_x / buf8[0]; 538 sc->trace_y = sc->max_y / buf8[1]; 539 540 if (ietp_iic_read_reg(dev, IETP_PRESSURE, sizeof(buf), &buf) != 0) { 541 device_printf(sc->dev, "failed reading pressure format\n"); 542 return (EIO); 543 } 544 sc->pressure_base = (buf8[0] & 0x10) ? 0 : IETP_PRESSURE_BASE; 545 546 if (ietp_iic_read_reg(dev, IETP_RESOLUTION, sizeof(buf), &buf) != 0) { 547 device_printf(sc->dev, "failed reading resolution\n"); 548 return (EIO); 549 } 550 /* Conversion from internal format to dot per mm */ 551 sc->res_x = ietp_res2dpmm(buf8[0], sc->hi_precision); 552 sc->res_y = ietp_res2dpmm(buf8[1], sc->hi_precision); 553 554 return (ietp_attach(sc)); 555 } 556 557 static int 558 ietp_iic_detach(device_t dev) 559 { 560 struct ietp_softc *sc = device_get_softc(dev); 561 562 if (ietp_iic_set_absolute_mode(dev, false) != 0) 563 device_printf(dev, "failed setting standard mode\n"); 564 565 return (ietp_detach(sc)); 566 } 567 568 static int 569 ietp_iic_resume(device_t dev) 570 { 571 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 572 device_printf(dev, "reset when resuming failed: \n"); 573 return (EIO); 574 } 575 576 return (0); 577 } 578 579 static int 580 ietp_iic_set_absolute_mode(device_t dev, bool enable) 581 { 582 struct ietp_softc *sc = device_get_softc(dev); 583 static const struct { 584 uint16_t ic_type; 585 uint16_t product_id; 586 } special_fw[] = { 587 { 0x0E, 0x05 }, { 0x0E, 0x06 }, { 0x0E, 0x07 }, { 0x0E, 0x09 }, 588 { 0x0E, 0x13 }, { 0x08, 0x26 }, 589 }; 590 uint16_t val; 591 int i, error; 592 bool require_wakeup; 593 594 error = 0; 595 596 /* 597 * Some ASUS touchpads need to be powered on to enter absolute mode. 598 */ 599 require_wakeup = false; 600 if (!sc->open) { 601 for (i = 0; i < nitems(special_fw); i++) { 602 if (sc->ic_type == special_fw[i].ic_type && 603 sc->product_id == special_fw[i].product_id) { 604 require_wakeup = true; 605 break; 606 } 607 } 608 } 609 610 if (require_wakeup && hid_intr_start(dev) != 0) { 611 device_printf(dev, "failed writing poweron command\n"); 612 return (EIO); 613 } 614 615 val = enable ? IETP_CTRL_ABSOLUTE : IETP_CTRL_STANDARD; 616 if (ietp_iic_write_reg(dev, IETP_CONTROL, val) != 0) { 617 device_printf(dev, "failed setting absolute mode\n"); 618 error = EIO; 619 } 620 621 if (require_wakeup && hid_intr_stop(dev) != 0) { 622 device_printf(dev, "failed writing poweroff command\n"); 623 error = EIO; 624 } 625 626 return (error); 627 } 628 629 static int 630 ietp_iic_read_reg(device_t dev, uint16_t reg, size_t len, void *val) 631 { 632 device_t iichid = device_get_parent(device_get_parent(dev)); 633 uint16_t addr = iicbus_get_addr(iichid) << 1; 634 uint8_t cmd[2] = { reg & 0xff, (reg >> 8) & 0xff }; 635 struct iic_msg msgs[2] = { 636 { addr, IIC_M_WR | IIC_M_NOSTOP, sizeof(cmd), cmd }, 637 { addr, IIC_M_RD, len, val }, 638 }; 639 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 640 int error; 641 642 DPRINTF("Read reg 0x%04x with size %zu\n", reg, len); 643 644 error = hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird); 645 if (error != 0) 646 return (error); 647 648 DPRINTF("Response: %*D\n", (int)len, val, " "); 649 650 return (0); 651 } 652 653 static int 654 ietp_iic_write_reg(device_t dev, uint16_t reg, uint16_t val) 655 { 656 device_t iichid = device_get_parent(device_get_parent(dev)); 657 uint16_t addr = iicbus_get_addr(iichid) << 1; 658 uint8_t cmd[4] = { reg & 0xff, (reg >> 8) & 0xff, 659 val & 0xff, (val >> 8) & 0xff }; 660 struct iic_msg msgs[1] = { 661 { addr, IIC_M_WR, sizeof(cmd), cmd }, 662 }; 663 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 664 665 DPRINTF("Write reg 0x%04x with value 0x%04x\n", reg, val); 666 667 return (hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird)); 668 } 669 670 static device_method_t ietp_methods[] = { 671 DEVMETHOD(device_identify, ietp_iic_identify), 672 DEVMETHOD(device_probe, ietp_iic_probe), 673 DEVMETHOD(device_attach, ietp_iic_attach), 674 DEVMETHOD(device_detach, ietp_iic_detach), 675 DEVMETHOD(device_resume, ietp_iic_resume), 676 DEVMETHOD_END 677 }; 678 679 static driver_t ietp_driver = { 680 .name = "ietp", 681 .methods = ietp_methods, 682 .size = sizeof(struct ietp_softc), 683 }; 684 685 DRIVER_MODULE(ietp, hidbus, ietp_driver, NULL, NULL); 686 MODULE_DEPEND(ietp, hidbus, 1, 1, 1); 687 MODULE_DEPEND(ietp, hid, 1, 1, 1); 688 MODULE_DEPEND(ietp, evdev, 1, 1, 1); 689 MODULE_VERSION(ietp, 1); 690 HID_PNP_INFO(ietp_iic_devs); 691